Re: Inplicit differentiation
- To: mathgroup at smc.vnet.net
- Subject: [mg63547] Re: [mg63533] Inplicit differentiation
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Thu, 5 Jan 2006 03:12:15 -0500 (EST)
- Reply-to: hanlonr at cox.net
- Sender: owner-wri-mathgroup at wolfram.com
eqn=x^2 *y+(y+x)^3==0; D[y/.Solve[eqn,y],x]//Simplify %//FullSimplify Bob Hanlon > > From: Fernando Rodríguez <frr at easyjob.net> To: mathgroup at smc.vnet.net > Date: 2006/01/04 Wed AM 03:17:10 EST > Subject: [mg63547] [mg63533] Inplicit differentiation > > > Hi, > > How can I ask Mathematica to differentiate a function if y is not easily > isolated? For instance: > > x^2 y + (y + x)^3 = 0 > > If I call D[x^2 y + (y + x)^3 == 0, x] it won't return the correct answer, > as it will consider y a constant. > > Thanks! > > >